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Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i32.c')
-rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i32.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i32.c b/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i32.c new file mode 100644 index 0000000..f51d37b --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i32.c @@ -0,0 +1,64 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3a, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014 The Regents of the University of California. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions, and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions, and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + 3. Neither the name of the University nor the names of its contributors may + be used to endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY +EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE +DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +=============================================================================*/ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "softfloat.h" + +int_fast32_t f64_to_i32( float64_t a, uint_fast8_t roundingMode, bool exact ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + bool sign; + int_fast16_t exp; + uint_fast64_t sig; + int_fast16_t shiftCount; + + uA.f = a; + uiA = uA.ui; + sign = signF64UI( uiA ); + exp = expF64UI( uiA ); + sig = fracF64UI( uiA ); + if ( (exp == 0x7FF) && sig ) sign = 0; + if ( exp ) sig |= UINT64_C( 0x0010000000000000 ); + shiftCount = 0x42C - exp; + if ( 0 < shiftCount ) sig = softfloat_shiftRightJam64( sig, shiftCount ); + return softfloat_roundPackToI32( sign, sig, roundingMode, exact ); + +} + |